benchmarks/lmbench: Unbreak on all platforms

The PLIST_SUB hack that worked for years stopped working with recent
changes to PLIST_SUB handling.  We don't need to run a script to
figure out where the files are getting installed.  We can recreate it
from ARCH, OPSYS, and OSREL variables.
Update to version 1.2.2.

PR:		194765
Submitted by:	olivierd@FreeBSD.org
Update to version 1.9.1

Phabric:	D998
benchmarks/lmbench: Make os file more robust

It's possible that the previous fix won't work when host version
doesn't match jail version, so recreate the "os" script to ensure
that the PLIST_SUB variable and build directory always match.
www/pecl-yar: update 1.2.3 -> 1.2.4

PR:		194552
Submitted by:	John Chen <johnpupu@gmail.com>
Approved by:	mentors (implicit)
- Update to 0.7.3
Update Simgear and Flightgear ports to 3.2.0

PR:		194571
Submitted by:	mike.d.ft402@gmail.com